 1919, the Treaty of Versailles was signed in France, ending the First World War. 1939, Pan American Airways began regular transatlantic air service with the flight that departed New York for France. 1940, President Franklin D. Roosevelt signed the Alien Registration Act, also known as the Smith Act, which required adult foreigners residing in the U.S. to be registered and fingerprinted. 1950, North Korean forces captured Seoul, the capital of South Korea.